Fix header level

Signed-off-by: Spencer Magnusson <[email protected]>

docs/tutorials/time-ranges.md

@@ -112,24 +112,24 @@ The `trimmed_range_in_parent()` is specified in the parent time frame.
 
 ## Tracks
 
-#### `Track.available_range()`
+### `Track.available_range()`
 
 Total duration of the track, totalling all items inside it.
 For example, if there is a clip and a gap in the track,
 and each is 5 seconds long, the `available_range()`
 would return 10 seconds.
 
-#### `Track.range_of_child_at_index(index)`
+### `Track.range_of_child_at_index(index)`
 
 Returns range of nth item (specified by `index`) in the track.
 Same as item's `duration`, including transition time.
 
-#### `Track.trimmed_range_of_child_at_index(index)`
+### `Track.trimmed_range_of_child_at_index(index)`
 
 Same as `range_of_child_at_index()`,
 but trimmed relative to the track's source range.
 
-#### `Track.range_of_all_children()`
+### `Track.range_of_all_children()`
 
 Returns a list of every item,
 mapped to their trimmed range in the track.
@@ -153,49 +153,49 @@ time.
 
 ## Transitions
 
-#### `Transition.range_in_parent()`
+### `Transition.range_in_parent()`
 
 Range of transition for whatever holds the transition.
 Calls its parent's `range_in_child()`.
 
-#### `Transition.trimmed_range_in_parent()`
+### `Transition.trimmed_range_in_parent()`
 
 The same as `range_in_parent()`,
 but trimmed relative to the parent.
 Calls its parent's `trimmed_range_in_child()`.
 
 ## Gaps
 
-#### `Gap.source_range`
+### `Gap.source_range`
 
 Time range of the gap, in between other items like Clips.
 
 ## Stacks
 
-#### `Stack.source_range`
+### `Stack.source_range`
 
 Defined range for the set of tracks.
 
-#### `Stack.available_range()`
+### `Stack.available_range()`
 
 Returns a range representing its tracks' longest duration
 (based on the underlying clip `duration()`s).
 
-#### `Stack.range_of_child_at_index(int index)`
+### `Stack.range_of_child_at_index(int index)`
 
 Returns the total duration of the track at position `index`.
 
-#### `Stack.trimmed_range_of_child_at_index(int index)`
+### `Stack.trimmed_range_of_child_at_index(int index)`
 
 Same as `range_of_child_at_index()`, but trimmed relative
 to the duration of the `source_range` of the stack.
 
-#### `Stack.range_of_all_children()`
+### `Stack.range_of_all_children()`
 
 Returns set of Tracks mapped to their individual time ranges.
 
 ## Timelines
 
-#### `Timeline.range_of_child(child)`
+### `Timeline.range_of_child(child)`
 
 Get trimmed time range of direct as well as indirect children (like clips and gaps).